CN103803762B - A kind of organic composite soil efficient ecological water cleaning systems - Google Patents
A kind of organic composite soil efficient ecological water cleaning systems Download PDFInfo
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- CN103803762B CN103803762B CN201410070924.9A CN201410070924A CN103803762B CN 103803762 B CN103803762 B CN 103803762B CN 201410070924 A CN201410070924 A CN 201410070924A CN 103803762 B CN103803762 B CN 103803762B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 239000002689 soil Substances 0.000 title claims abstract description 48
- 238000004140 cleaning Methods 0.000 title claims abstract description 10
- 239000002131 composite material Substances 0.000 title claims abstract description 10
- 230000008595 infiltration Effects 0.000 claims abstract description 44
- 238000001764 infiltration Methods 0.000 claims abstract description 44
- 239000004576 sand Substances 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 25
- 239000010865 sewage Substances 0.000 claims abstract description 25
- 230000008635 plant growth Effects 0.000 claims abstract description 6
- 238000001035 drying Methods 0.000 claims abstract description 5
- 239000004744 fabric Substances 0.000 claims abstract description 5
- 238000009736 wetting Methods 0.000 claims abstract description 5
- 241000196324 Embryophyta Species 0.000 claims description 23
- 244000005700 microbiome Species 0.000 claims description 12
- 238000010521 absorption reaction Methods 0.000 claims description 10
- 230000000694 effects Effects 0.000 claims description 10
- 239000011159 matrix material Substances 0.000 claims description 9
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 239000005445 natural material Substances 0.000 claims description 6
- 238000000746 purification Methods 0.000 claims description 6
- 230000005484 gravity Effects 0.000 claims description 5
- 230000029058 respiratory gaseous exchange Effects 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 239000012528 membrane Substances 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 241000684239 Canna x generalis Species 0.000 claims description 3
- 241001672212 Cenchrus purpureus Species 0.000 claims description 3
- 235000007516 Chrysanthemum Nutrition 0.000 claims description 3
- 244000189548 Chrysanthemum x morifolium Species 0.000 claims description 3
- 241001423497 Himalayacalamus falconeri Species 0.000 claims description 3
- 239000003344 environmental pollutant Substances 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 231100000719 pollutant Toxicity 0.000 claims description 3
- 230000000241 respiratory effect Effects 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 238000005275 alloying Methods 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 abstract description 5
- 238000010276 construction Methods 0.000 abstract description 4
- 238000011109 contamination Methods 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 230000002000 scavenging effect Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 231100000572 poisoning Toxicity 0.000 description 3
- 230000000607 poisoning effect Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 238000007726 management method Methods 0.000 description 2
- 230000000050 nutritive effect Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 241001148470 aerobic bacillus Species 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 238000002306 biochemical method Methods 0.000 description 1
- 238000005842 biochemical reaction Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 238000009336 multiple cropping Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000013138 pruning Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
- 239000008207 working material Substances 0.000 description 1
Landscapes
- Treatment Of Biological Wastes In General (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention discloses a kind of organic composite soil efficient ecological water cleaning systems, comprise the filter bed in body of wall and body of wall, be provided with surface cloth water pipe above described body of wall and be provided with water outlet below body of wall, described filter bed is divided into plant-growth district, primary sand screen floor, fast infiltration layer, aqueous stratum, slow infiltration layer and water-yielding stratum from top to bottom successively; Scavenging process of the present invention adopts the mode of alternation of wetting and drying, four cycles that being divided into circulate carries out: water inlet is oozed phase, retaining soon and oozed the phase slowly, oozes deep purifying phase and vacant decubation slowly.The present invention has that floor space is little, anti impulsion load is high, stable water outlet, short construction period, cost are low, initial cost is few, maintenance management is convenient, operation cost is low, secondary pollution low (mud generation is minimum), ecoscape benefit are good, be suitable for carrying out spread in the sanitary sewage disposal of rural area and suburban area, be also suitable for organic contamination reparation and the Environmental capacity of the water body such as small rivers and lake.
Description
Technical field
The invention belongs to the purification treatment technology field of low-concentration organic wastewater, especially a kind of organic composite soil efficient ecological water cleaning systems being applicable to rural area and suburban area sewage disposal.
Background technology
Current rural area and suburban area water pollutions severeer, but delayed owing to planning, its sewage disposal still belongs to the starting stage, and there is many problems, reason is: one is construction fund famine; Two is that people's attention degree is inadequate; Three is lack the sewage disposal technology being applicable to rural areas in our country reality.Villages and small towns sewage treatment process is except the traditional activated sludge process of routine, apply more technology and have artificial swamp (comprising surface low, vertical current and undercurrent), Rapid Infiltration Treatment System, underground seepage & filter treatment system, purification tank technology, methane-generating pit technology, wherein artificial swamp and oxidation pond treatment process are applied comparatively general, oxidation pond technique is applicable to process the lower sewage of pollution level, but there is the problem that anti impulsion load is poor, occupation of land is large, processing efficiency is low.Though artificial swamp has, counter investment cost is little, working cost is low, running maintenance technical requirements is not high, can carry out in conjunction with view the feature of building etc., but there is the defect that floor space is large, processing load is low, anti impulsion load is poor equally, and maintenance and management is not too inconvenient.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of new treatment process extremely strong with general middle low-concentration organic wastewater treatment technology suitability to country sewage, the problem such as artificial swamp, conventional soil treatment process and oxidation pond technique floor space is large, economic benefit is low, difficult in maintenance, anti impulsion load is poor, easy blocking can be overcome.
Technical scheme of the present invention is: a kind of organic composite soil efficient ecological water cleaning systems, comprise the filter bed in body of wall and body of wall, be provided with surface cloth water pipe above described body of wall and be provided with water outlet below body of wall, it is characterized in that: described filter bed is divided into plant-growth district, primary sand screen floor, fast infiltration layer, aqueous stratum, slow infiltration layer and water-yielding stratum from top to bottom successively.
Described primary sand screen floor height is 4 ~ 6cm, is main material with fine sand; Fast infiltration layer is made up of original soil and the organic natural material of inertia, and fast alloying layer thickness is 40 ~ 60cm; Aqueous stratum is with resistance to compression water-permeable pipe and configure coarse sand for matrix, and aqueous stratum is provided with the respiratory siphon stretching out primary sand screen layer surface, and aqueous stratum thickness is 15 ~ 30cm; Slow infiltration layer is made up of original soil and the organic natural material of inertia, and floor height is 40 ~ 60cm; Water-yielding stratum is with resistance to compression water-permeable pipe and configure coarse sand and fine sand is matrix, and the below of matrix is provided with anti seepage membrane, water outlet floor height 15 ~ 25cm; Filter bed total height is 114 ~ 181cm, and body of wall is higher than primary sand screen layer 30 ~ 40cm, and filter tank height overall controls at 144 ~ 221cm.
Described plant can select the non-immediate such as terrestrial plant hybrid giant napier, napier grass with economic worth to eat cash crop, or has the ornamental plant such as chrysanthemum, Canna generalis Bailey, fairy bamboo, iris of effect of well viewing and admiring.
Present invention also offers a kind of purifying method of organic composite soil efficient purifying system, it is characterized in that: the mode adopting alternation of wetting and drying, four cycles that being divided into circulate carries out: water inlet is oozed phase, retaining soon and oozed the phase slowly, oozes deep purifying phase and vacant decubation slowly, and detailed process is:
1, water inlet oozes the phase soon: former water is promoted by gravity or pump and flows into treatment zone, for avoiding because immersion is breathed poisoning to terrestrial plant, water inlet height general control is at below 30cm, under gravity, sewage carries out oozing fast at fast infiltration layer from top to down, sewage carries out absorption by the powerful absorption of fast infiltration layer and interception capacity the suspended substance of the wherein overwhelming majority and soluble pollutants and clears up purification, and in 60 minutes, complete surperficial solid carbon dioxide, the water of fast infiltration layer process drops to aqueous stratum simultaneously;
2, retaining oozes the phase slowly: because aqueous stratum has larger space and infiltration rate is fast, and slow infiltration layer infiltration rate is slower, vertical seepage flow is carried out in the slow infiltration layer of water in aqueous stratum, define the negative pressure above main liquid level, air enters soil under condition of negative pressure, add the oxygen level of soil, for the rapid-digestion of soil microorganisms and the breathing of root system of plant provide good condition;
3, ooze the deep purifying phase slowly: water carries out vertical seepage flow lentamente in slow infiltration layer, thus under the effect of soil and microorganism, fully remove the pollutent in water and reach emission level;
4, vacant decubation: water is discharged through water outlet after dropping to water-yielding stratum, after draining completes, soil enters vacant decubation, the pollutent adsorbed in soil is completed by the acting in conjunction of microorganism and root system of plant to be cleared up and absorbs, and this process soil air environment and atmospheric gas pressure reach balance gradually.
In general, the number of times of alternation of wetting and drying is more, and the treatment effect of system is better, and processing efficiency is higher.In said process, the Main Function of aqueous stratum has: one is the lower infiltration rate degree guaranteeing fast infiltration layer, causes plant respiration poisoning, ensure the good breathing environment of terrestrial plant to greatest extent to avoid sewage to stop for a long time at upper soll layer; Two is play dash adjustment effect, extends the residence time of sewage in soil, to guarantee wastewater purifying efficiency; Three is increase oxygen level in soil, enriches kind and the quantity of aerobic bacteria further, improves COD degradation efficiency further, is also greatly beneficial to that ammonia nitrogen is denitrifying to carry out simultaneously.
Principle of work of the present invention is: after sewage dosing to filter bed, rises along soil capillary, and utilized by the physics detention of soil, soil absorption absorption, microbial decomposition and a series of effect such as plant absorption, the organism in sewage is removed.Wherein the activity of soil microorganisms is very important, under the effect of microorganism, is decomposed changes into inorganics through biochemical reaction, and this is the critical process removing organic pollutant.Herbaceous plant is also the important channel of sewage purification to the absorption of nutritive element.Nitrogen in sewage, phosphorus etc., as the necessary nutrient of plant-growth, are absorbed and used by root system of plant, be moved out of system reach the object removed when mowing.Frequent pruning plant can make the removal amount of nutritive element reach maximum.The growth of plant simultaneously also greatly changes the envrionment conditions of sewage treatment process.Go deep into soil due to root system of plant and increase the soil organism, both having improve the waterpower osmosis speed of soil, and also contributed to the microenvironment in the good roots of plants district of creation one, being conducive to microorganism to the degraded of polluting.
Beneficial effect of the present invention is:
1, floor space is little, anti impulsion load is high: reoxygenation efficiency brings high treatment efficiency efficiently, one square metre takes up an area the maximum sanitary sewage processing two cubic metres, and reach 1500mg/L at inlet COD concentration, still can remain on the removal efficiency of 80%, this be artificial swamp and general aerobic biochemical technique institute can not and.
2, ripe earth working material is adopted, without the need to carrying out a large amount of rock ballast and gravel cleaning as artificial swamp engineering, also without large-scale reinforced concrete pouring construction, short construction period, cost is low, initial cost is few, and has the crop of higher economic worth by plantation, can create good economic benefit.
3, require low to Personnel Skill Levels, maintenance management is convenient, and operation cost is low; except the short period of time of water inlet phase; earth's surface is dry state, and sanitary condition is good, for small rural sewage; even if physical features is comparatively low-lying; also only need once promote, power consumption is little, again because a large amount of original soil that adopts carries out organic configuration backfill; the multiple cropping of taking up an area is very convenient, protects arable land.
4, secondary pollution low (mud generation is minimum), ecoscape benefit are good, be suitable for carrying out spread in the sanitary sewage disposal of rural area and suburban area, be also suitable for organic contamination reparation and the Environmental capacity of general water body (as small rivers and lake).
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
In figure, 1-respiratory siphon, 2--plant-growth district, 3--primary sand screen layer, the fast infiltration layer of 4--, 5-aqueous stratum, the slow infiltration layer of 6-, 7-water-yielding stratum, 8-body of wall, 9-anti seepage membrane, 10-surface cloth water pipe.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further:
As shown in Figure 1, organic composite soil efficient ecological water cleaning systems provided by the present invention, comprise the filter bed in body of wall 8 and body of wall 8, be provided with surface cloth water pipe 10 above the body of wall 8 of antiseepage and be provided with water outlet below body of wall 8, filter bed is divided into plant-growth district 2, primary sand screen floor 3, fast infiltration layer 4, aqueous stratum 5, slow infiltration layer 6 and water-yielding stratum 7 from top to bottom successively.
Wherein primary sand screen layer 3 height is 5cm, is main material with fine sand; Fast infiltration layer 4 is made up of original soil and the organic natural material of inertia, and fast infiltration layer 4 thickness is 60cm; Aqueous stratum 5 is with resistance to compression water-permeable pipe and configure coarse sand for matrix, and aqueous stratum 5 is provided with the respiratory siphon 1 stretching out primary sand screen layer 3 surface, and aqueous stratum 5 thickness is 30cm; Slow infiltration layer 6 is made up of original soil and the organic natural material of inertia, and floor height is 60cm; Water-yielding stratum 7 is with resistance to compression water-permeable pipe and configure coarse sand and fine sand is matrix, and the below of matrix is provided with anti seepage membrane 9, the high 20cm of water-yielding stratum 7; Filter bed total height is 175cm, and body of wall 8 is higher than primary sand screen layer 35CM, and filter tank height overall controls at 210cm; Plant then can select the plants and flowers such as the herbage such as hybrid giant napier, napier grass or chrysanthemum, Canna generalis Bailey, fairy bamboo, iris.
Scavenging process of the present invention adopts the mode of alternation of wetting and drying, four cycles that being divided into circulate carries out: water inlet is oozed phase, retaining soon and oozed the phase slowly, oozes deep purifying phase and vacant decubation slowly, and detailed process is:
1, water inlet oozes the phase soon: former water is promoted by gravity or pump and flows into treatment zone, for avoiding because immersion is breathed poisoning to terrestrial plant, water inlet height general control is at below 30cm, under gravity, sewage carries out oozing fast at fast infiltration layer from top to down, sewage carries out absorption by the powerful absorption of fast infiltration layer and interception capacity the suspended substance of the wherein overwhelming majority and soluble pollutants and clears up purification, in 60 minutes, left and right completes surperficial solid carbon dioxide simultaneously, and the water of fast infiltration layer process drops to aqueous stratum 4;
2, retaining oozes the phase slowly: because aqueous stratum 4 has larger space and infiltration rate is fast, and slow infiltration layer 6 infiltration rate is relatively slow, water in aqueous stratum 5 carries out vertical seepage flow in slow infiltration layer 6, this process forms the negative pressure above main liquid level, air enters soil under condition of negative pressure, add the oxygen level of soil, for the rapid-digestion of soil microorganisms and the breathing of root system of plant provide good condition;
3, ooze the deep purifying phase slowly: water carries out vertical seepage flow lentamente in slow infiltration layer 6, thus under the effect of soil and microorganism, fully remove the pollutent in water and reach emission level;
4, vacant decubation: water is discharged through water outlet after dropping to water-yielding stratum 7, after draining completes, soil enters vacant decubation, the pollutent adsorbed in soil is completed by the acting in conjunction of microorganism and root system of plant to be cleared up and absorbs, this process soil air environment and atmospheric gas pressure balance gradually, and the time is three hours.
When processing general sanitary sewage, land used load of the present invention is about at 1m
3sewage/1m
2take up an area, filtering layer significant depth reaches more than 1m, intakes daily periodicity three to four times, and test shows repeatedly, and its Inlet and outlet water can stablize effect in Table 1.
Claims (3)
1. an organic composite soil efficient ecological water cleaning systems, comprise the filter bed in body of wall and body of wall, be provided with surface cloth water pipe above described body of wall and be provided with water outlet below body of wall, it is characterized in that: described filter bed is divided into plant-growth district, primary sand screen floor, fast infiltration layer, aqueous stratum, slow infiltration layer and water-yielding stratum from top to bottom successively; Described primary sand screen floor height is 4 ~ 6cm, is main material with fine sand; Fast infiltration layer is made up of original soil and the organic natural material of inertia, and fast alloying layer thickness is 40 ~ 60cm; Aqueous stratum is with resistance to compression water-permeable pipe and configure coarse sand for matrix, and aqueous stratum is provided with the respiratory siphon stretching out primary sand screen layer surface, and aqueous stratum thickness is 15 ~ 30cm; Slow infiltration layer is made up of original soil and the organic natural material of inertia, and floor height is 40 ~ 60cm; Water-yielding stratum is with resistance to compression water-permeable pipe and configure coarse sand and fine sand is matrix, and the below of matrix is provided with anti seepage membrane, water outlet floor height 15 ~ 25cm; Filter bed total height is 114 ~ 181cm, and body of wall is higher than primary sand screen layer 30 ~ 40cm, and total height controls at 144 ~ 221cm.
2. organic composite soil efficient ecological water cleaning systems according to claim 1, is characterized in that: the hybrid giant napier in described Plant choosing terrestrial plant, napier grass, or chrysanthemum, Canna generalis Bailey, fairy bamboo, iris.
3. the purifying method of organic composite soil efficient ecological water cleaning systems according to claim 1, it is characterized in that: the mode adopting alternation of wetting and drying, four cycles that being divided into circulate carries out: water inlet is oozed phase, retaining soon and oozed the phase slowly, oozes deep purifying phase and vacant decubation slowly, and detailed process is:
(1) water inlet oozes the phase soon: former water flows into treatment zone, water inlet Altitude control is at below 30cm, sewage carries out oozing fast at fast infiltration layer from top to down under gravity, sewage carries out absorption by the powerful absorption of fast infiltration layer and interception capacity the suspended substance of the wherein overwhelming majority and soluble pollutants and clears up purification, and the water of fast infiltration layer process simultaneously drops to aqueous stratum;
(2) retaining oozes the phase slowly: because aqueous stratum has larger space and infiltration rate is fast, and slow infiltration layer infiltration rate is slower, water in aqueous stratum carries out vertical seepage flow in slow infiltration layer, define the negative pressure above main liquid level, air enters soil under condition of negative pressure, add the oxygen level of soil, for the rapid-digestion of soil microorganisms and the breathing of root system of plant provide good condition;
(3) ooze the deep purifying phase slowly: water carries out vertical seepage flow lentamente in slow infiltration layer, thus under the effect of soil and microorganism, fully remove the pollutent in water and reach emission level;
(4) vacant decubation: water is discharged through water outlet after dropping to water-yielding stratum, after draining completes, soil enters vacant decubation, the pollutent adsorbed in soil is completed by the acting in conjunction of microorganism and root system of plant to be cleared up and absorbs, and this process soil air environment and atmospheric gas pressure reach balance gradually.
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| CN103981834B (en) * | 2014-05-28 | 2016-01-20 | 常州大学 | Low discharge river water cleaning and pollution blocking apparatus |
| CN104671424B (en) * | 2015-03-16 | 2016-06-22 | 沈阳环境科学研究院 | A kind of selection-breeding acclimation method of drowned flow artificial wet land plant |
| CN106034818A (en) * | 2016-07-22 | 2016-10-26 | 辽宁工程技术大学 | Low elevation greenbelt paving structure based on sponge city ideas |
| CN107047266A (en) * | 2017-01-24 | 2017-08-18 | 河海大学 | A kind of industrial crops band for agriculture irrigated area irrigation canals and ditches pollutant fluxes |
| CN109133494A (en) * | 2018-07-06 | 2019-01-04 | 广州格淋环境保护技术有限公司 | A kind of complex ecological water purification system and its process for purifying water |
| CN110498509B (en) * | 2019-08-22 | 2023-09-22 | 广西师范大学 | A high ammonia nitrogen sewage treatment device and a method for sewage treatment using the same |
| CN111574000A (en) * | 2020-06-17 | 2020-08-25 | 广西金妙松环保工程有限公司 | Hydraulic ecological purification system |
| CN112759201A (en) * | 2021-01-15 | 2021-05-07 | 西安建筑科技大学 | Self-maintenance sewage treatment integrated equipment and sewage treatment method thereof |
| CN113149209B (en) * | 2021-04-15 | 2022-10-25 | 西北工业大学 | A series of vertical aerobic and anaerobic combined underground soil infiltration system |
| CN114656113A (en) * | 2022-04-19 | 2022-06-24 | 海南南洋新鑫环保科技有限公司 | Novel mariculture tail water treatment and recycling process |
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Address after: 510000, Guangdong science and Technology Development Zone, Guangzhou hi tech Development Zone, 33 science Avenue, four, 401, 416, 418 rooms Patentee after: GUANGZHOU GELIN ENVIRONMENTAL PROTECTION TECHNOLOGY CO., LTD. Address before: 510000, Qin Tian mansion, 238 West Zhongshan Road, Guangzhou, Guangdong, Tianhe District, 1502 Patentee before: GUANGZHOU GELIN ENVIRONMENTAL PROTECTION TECHNOLOGY CO., LTD. |